Check cylinders for leaks · ar0100s1300a · Mercedes-Benz WIS

AR01.00-S-1300A

Check cylinders for leaks

15.11.2019

Engine

111 in model 638

1	Oil filler cap
2	Cylinder leakage tester
3	Connector
E83-E86	Spark plugs

S01.00-3002-06

 	Remove/install
1	Warm up engine to normal operating temperature	Coolant temperature approx. 80 °C
 Warning	Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.	Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses.	AS20.00-Z-0001-01A
2	Open engine cooling system cap
3	Check coolant level
			AP20.00-D-2010A
4	Unscrew oil filler cap (1)
 Danger	Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)	Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.	AS00.00-Z-0035-01A
5	Remove spark plugs (E83-E86)
			AP15.10-D-1580A
6	Position piston for cylinder to be checked at ignition TDC	Crank engine at crankshaft
Topical note	Notes on avoiding damage to ignition system		AH15.10-P-0002-01D
			AR01.00-S-0120A
		Cams at cylinder 1 are positioned upright at an angle, where req. for inspection.
		

		Remove cylinder head cover	AR01.20-S-5014A
7	Calibrate cylinder leakage tester (2) and screw connector (3) into spark plug bore	 Observe operating instructions
		 Connector	*111589009100
	Check
8	Apply compressed air to cylinder and read off pressure loss at cylinder leakage tester (2)	Engine 111.948/978Permissible pressure loss in total	*BE01.00-N-1001-02A
		Engine 111.948/978Permissible pressure losses on valves and cylinder head gasket	*BE01.00-N-1002-02A
		Engine 111.948/978Permissible pressure losses to pistons and piston rings	*BE01.00-N-1003-02A
		If crankshaft turns
		
		Install retaining lock for crankshaft/starter ring gear
			AR03.30-S-5000A
		For increased pressure loss
		
		Determine cylinder pressure loss
			AH01.00-N-1300-02A
9	Conduct test for other cylinders in the firing order of the engine
	Firing order		AH01.00-N-0100-01A
10	Remove cylinder leakage tester (2) and connector
11	Install in the reverse order

Check values for cylinder leakage

Number	Designation		Engine 111.948/978
BE01.00-N-1001-02A	Permissible pressure loss in total	%	25

Check values for cylinder leakage

Number	Designation		Engine 111.948/978
BE01.00-N-1002-02A	Permissible pressure losses on valves and cylinder head gasket	%	10

Check values for cylinder leakage

Number	Designation		Engine 111.948/978
BE01.00-N-1003-02A	Permissible pressure losses to pistons and piston rings	%	20

111 589 00 91 00

Connector

Referenced documents

ah0100n010001a Firing order
ah0100n130002a Determine loss of pressure at cylinder
ah1510p000201d Notes on avoiding damage to ignition system
ap1510d1580a Replace spark plugs
ap2000d2010a Engine cooling system - check fluid level, adjust to correct level. Inspect anticorrosion/antifreeze protection, adjust to correct concentration
ar0100s0120a Rotate the engine from the front part of the crankshaft
ar0120s5014a Remove/install cylinder head cover
ar0330s5000a Remove/install retaining lock for crankshaft / ring gear
as0000z003501a Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)
as2000z000101a Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.